STAAR Chemistry Review

What are subatomic particles?

• protons, neutrons, and elements

• protons, neurons, and electrons

• protons, neutrons, and electrons

• protons, neurons, and elements

How many valence electrons?

• 1

• 3

• 8

• 13

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

If an atom has 3 electrons, how many protons does it have?

• 1
• 2
• 4
• 3

If the number of protons equal the number of _____, the atom will have no charge

• protons
• neutrons
• electrons
• nucleus

What is the mass number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

How many protons does Carbon have?

• 3

• 4

• 5

• 6

Negatively charged part of an atom located in levels outside the nucleus

• Proton
• Neutron
• Electron
• Neutron

Burning a piece of paper 

• Chemical Change 
• Physical Change 

Melting Ice 

• Chemical Change 
• Physical Change